I highly recommend that you look into setting up luma3ds and not rxtools. You will be severely hindered in the future if you bother to use rxtools. Follow this guide: https://github.com/Plailect/Guide/wiki/ up until part 4 step 17. This will have you setup luma 3ds, have fbi over your health and safety, and have menuhax. If you wish to, you can setup a9lh which is essentially a faster way to boot into cfw with a great amount of brick protection. Doing a9lh is something you should definitely consider though, but you should read over it before starting the process of it.